<template>
  <li @mouseenter="handleEnter(true)"
      @mouseleave="handleEnter(false)"
      :style="{backgroundColor:bgColor}"
  >
    <label>
      <input type="checkbox" v-model="todo.complete"/>
      <span>{{ todo.title }}</span>
    </label>
    <button class="btn btn-danger" v-show="isShow" @click="del">删除</button>
  </li>
</template>

<script>
export default {
  name: "TodoItem",
  props: {
    todo: Object,
    index: Number,
    delTodo: Function
  },
  data() {
    return {
      isShow: false,
      bgColor: "white"
    }
  },
  methods: {
    handleEnter(isEnter) {
      console.log(isEnter)
      if (isEnter) {
        this.bgColor = '#aaa'
        this.isShow = true
      } else {
        this.bgColor = 'white'
        this.isShow = false
      }
    },
    del() {
      const {todo,delTodo,index} = this
      if (confirm(`您确定要删除${todo.title}`)) {
        delTodo(index)
      }
    }
  }
}
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  /*line-height: 36px;*/
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  /*display: none;*/
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}

</style>
